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From: Bart Schaefer <schaefer@brasslantern.com>
To: Daniel Shahaf <d.s@daniel.shahaf.name>
Cc: "zsh-workers@zsh.org" <zsh-workers@zsh.org>,
	Martin Tournoij <martin@arp242.net>
Subject: Re: Any way to allow clobbering empty files when noclobber is set?
Date: Wed, 3 Jun 2020 22:00:09 -0700	[thread overview]
Message-ID: <CAH+w=7bwKvJ7F4JCu7CUuTVxivy8OScCFwN97DKnK9M9QXqVSA@mail.gmail.com> (raw)
In-Reply-To: <a36ec51a-6f76-454f-9a1a-327557de3223@www.fastmail.com>

On Wed, Jun 3, 2020 at 9:06 PM Daniel Shahaf <d.s@daniel.shahaf.name> wrote:>
>
> [ Let's call this UNLINK_EMPTY_AFTER_FAILURE for the sake of discussion. ]
>
> Bart Schaefer wrote on Thu, 04 Jun 2020 02:43 +00:00:
> >
> > How does that user experience differ from HIST_ALLOW_CLOBBER?
>
> Well, for one, because that proposal only takes effect when foo exited
> non-zero, created bar, and bar is zero-sized?

Fair enough, although (silly example) "false > empty" would remove the
file?  Wouldn't you at least want the reason for the unlink to be that
the redirection failed, rather than that the command exited non-zero?

What if the redirection target is a symbolic link?  What if it isn't a
plain file?

> > and silently unlinking a file is not very friendly.  The /etc/nologin
> > example in your next message comes to mind.
>
> Doesn't this argument also apply to anyone who might set CLOBBER_EMPTY
> and then lose the timestamps on empty files, as in your next message?

Yes, but to a lesser degree, because the file is at least still
present if it's presence means something.

> Seriously, though, it's perfectly possible that CLOBBER_EMPTY is the
> better solution here.  I was only brainstorming.

Sure, you just got me curious about thinking through it.

  reply	other threads:[~2020-06-04  5:01 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CGME20200603020919eucas1p13e26ebcbb335784d14bfb97b137f385a@eucas1p1.samsung.com>
2020-06-03  2:08 ` Martin Tournoij
2020-06-03 12:04   ` Peter Stephenson
2020-06-04  1:48     ` Daniel Shahaf
2020-06-04  2:43       ` Bart Schaefer
2020-06-04  4:06         ` Daniel Shahaf
2020-06-04  5:00           ` Bart Schaefer [this message]
2020-06-05  3:10             ` Daniel Shahaf
2020-06-05  3:18               ` Daniel Shahaf
2020-06-06  1:07               ` Bart Schaefer
2020-06-06  4:48                 ` Daniel Shahaf
2020-06-06  7:04                   ` Bart Schaefer
2020-06-04  6:31       ` Martin Tournoij
2020-06-05  2:22         ` Daniel Shahaf
2020-06-04  2:13     ` Vin Shelton
2020-06-04  2:35       ` Bart Schaefer
2020-06-04  2:36       ` Daniel Shahaf
2020-06-04 11:57         ` Vin Shelton
2020-06-04  5:06     ` Bart Schaefer
2020-06-04  5:41       ` Roman Perepelitsa
2020-06-05  2:07         ` Daniel Shahaf
2020-06-05  4:38           ` Roman Perepelitsa
2020-06-06  1:41             ` Bart Schaefer
2020-06-06  4:55               ` Daniel Shahaf
2020-06-06  6:25                 ` Roman Perepelitsa
2020-06-06  7:08                 ` Bart Schaefer
2020-06-06  8:03                   ` Daniel Shahaf
     [not found]           ` <1941572212.466119.1591360860372@mail2.virginmedia.com>
     [not found]             ` <e7f7dfe2-eb4a-457b-85fb-091935a74c0e@www.fastmail.com>
2020-06-06 11:57               ` Peter Stephenson
2020-06-06 12:48                 ` Roman Perepelitsa
2020-06-06 15:24                   ` Bart Schaefer
2020-06-06 16:24                     ` Peter Stephenson
2020-06-07 11:55                       ` Daniel Shahaf
2020-06-07 17:00                         ` Peter Stephenson
2020-06-08  3:27                           ` Daniel Shahaf
2020-06-08  9:30                             ` Peter Stephenson
2020-06-07 17:20                         ` Bart Schaefer
2020-06-06 15:09                 ` Bart Schaefer
2020-06-04  6:47       ` Martin Tournoij
2020-06-04  9:42       ` Peter Stephenson
2020-06-04 12:20         ` Roman Perepelitsa
2020-06-04 12:26           ` Peter Stephenson
2020-06-04 12:15     ` Peter Stephenson
2020-06-04 20:35       ` Bart Schaefer
2020-06-05  1:59         ` Daniel Shahaf

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